"To Catch a Killer" tells the true gruesome story of John Wayne Gacy - a good friend and helpful neighbour, a great child entertainer, a respectful businessman, and a violent serial killer who raped and murdered over 30 young boys.
John Wayne Gacy
Brian Dennehy
Joe 'Polock' Kozenczak
Michael Riley
Rachel Grayson
Margot Kidder
Linda Carlson
Meg Foster
Ted Koslo
Martin Julien
Mike Paxton
Scott Hylands
Atkins
John Boylan
Williams
David Eisner
DeMarco
Tony De Santis
King
Mark Humphrey
Petrie
Gary Reineke
Morris
Tim Progosh
Santori
Danny Pawlick
Bragg
Bruce Ramsay
Alice Pearson
Brenda Bazinet
Marcia Kozenczak
Liliane Clune
Michael Kozenczak
Toby Proctor
Billy
Christopher Marren
Walden
Gerry Quigley
Barton
Nicholas Pasco
Chief Cameron
Michael Copeman
Hoskins
James Kee
Pam
Brigette Lawson
Jake Burns
Jay Brazeau
Cindy Beck
Cynthia Preston
Vincent Austin
Andrew Gillies
Waldron
Kurt Reis
Mrs. Gant
Judith Goodwin
Mr. Gant
Shawn Lawrence
Lorna Gant
Jacqueline Graham
Christopher Gant
Nicholas Shields
Lisa Kozenczak
Sarah Gibney
Debbie Kozenczak
Aviva Magner
Mrs. Trask
Maureen McRae
Mr. Trask
Timm Zemanek
Helen Gacy
Maria Ricossa
Sheriff
Darryl Palmer
Mr. Miklovich
Peter Langley
Detective #1
John Friesen
Illinois K-9 Officer
Ray Paisley
Stan Wilder
Brett Halsey
Gas Station Attendant
Elliott Smith
Judge
David Gardner
Asst. Principal Burke
David Bolt
Foreman Hendricks
Thomas Hauff
Older Worker
David McAree
Sergeant on Wabash Ave.
J. Winston Carroll
Detective on Shakespeare Ave.
Don Ritchie
Cemetery Staffer
Rudy Webb
Cicero Bar Owner
Robbie Rox
Finger Lake Proprietor
Larry Reynolds
Man at Bus Station
Veliko Pajkovic
Narrator (voice)
John Granik
Waiter (uncredited)
Luis Guzmán
Pool Player (uncredited)
Peter Kerenyi